Lois Goodman Murder Trial: New DNA Evidence Surfaces

Mark Greenblatt has latest on professional tennis umpire accused of murder.
3:00 | 11/10/12

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Transcript for Lois Goodman Murder Trial: New DNA Evidence Surfaces
The case -- that professional tennis umpire accused of bludgeoning her husband to death with a coffee mug. Lois -- was arrested back in August dress up in the US open uniform. But it looks like a case against her may have been turned upside down ABC's mark Greenblatt is here with that story good morning -- Well good morning -- -- -- what she's alleged to have badly beaten her husband. Leaving him to die while going off to a tennis match and to get a manicure but this morning lawyers for this pro -- referee are hoping that science. We'll help set their -- for. Lawyers for what was -- hope new DNA evidence will exonerate their seven year old client. The longtime tennis -- stands accused of bludgeoning her husband to death with a coffee cup charges Goodman's daughter has refuted for months. My mother would never do something like this ever not a million years. She's completely innocent. The -- line judge has sparred with John McEnroe and some of the sport's biggest stars on the court. It was still in uniform when police arrested her just days before the US open in August charging her with the murder of Alan Goodman. We did an autopsy and it was determined that. He died at the hands of another. That now her lawyer says new forensic evidence recently turned over by prosecutors. Show's lowest Goodman's DNA was nowhere to be found on the alleged murder weapon. Bolstering their claim Alan Goodman simply fell down the stairs and hit his head on that coffee cup. It's the latest salvo from the defense after they previously hired a retired FBI agent to administer polygraph test looking for abnormal body language. I asked did you kill Alan Goodman. And at your residence did you kill your husband. There was no physiological reaction attached to those answers that she gave which were no. His conclusion innocent woman and as for the latest revelation law enforcement experts say the lack of DNA on the -- -- won't make a difference a trial. It doesn't really matter whether -- DNA was found are not in fact it's not uncommon. For a suspect's DNA to not be on a murder weapon whether it be a gun a knife in this case a coffee cup. And the very reason he says that is that if the suspect holding that coffee -- had any gloves on. They wouldn't leave any DNA behind in and -- on -- police say that there. Certain that this was no accident. You know I've sat with her family and they are certain that she is innocent citizens -- really -- -- -- mark thank you very much.

This transcript has been automatically generated and may not be 100% accurate.

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